I have had the wonderful pleasure of meeting one lady who participates in TMF but we didn't connect through TMF. I have chatted with some others but that is as far as it has gone.
I believe that many people ave very cautious (as they should be) in real-life meetings with online friends. Everyday it is ingrained in our heads that there are lots of bad people on the internet who are preditors - people trying to lure you into meeting them for bad purposes. What is not reinforced in our minds is that most people are actually good people! We always hear about the bad and rarely hear about the good because good doesn't make news!
While it is true that some people are out to decieve you online, it is also true that these same people may be your co-workers, next door neighbors, postal delivery person... These people will act the same way online as well as in real-life - it is part of their personality.
The truth is, the majority of people are good people - in real-life and online. Using common sense and agreeing on safety/security issues BEFORE meeting cango a long way towards a safe, wonderful encounter and a strong friendship.
There are several things that you can do to make it work safely and comfortably.
1) Chat online for a while. Do not ever rush into a meeting. Get a feel for the person online. If you do not feel comfortable with the person form your online chats then it is probably not a good idea to go past this point - remain online chatters if you want but always trust your instincts. If, on the otherhand, you like what you see, moveonto step 2...
2) Talk on the telephone. You can learn a lot more about a person from their vocal inflections and their "real-time" responses than you can from the printed word. Use the telephone in the same way you would talk to any other friend. Learn about how your online friend reacts in verious situations. How does he/she react when you are happy? How does he/she react when you are sad/hurting? Does this person seem to make you feel comfortable when you chat? Do you feel like you are getting open and honest answers from this person? Again, if you are not comfortable with this person after the telephone conversations, trust your instincts. If you like where it is going, keep talking on the phone (and sending emails) - build the friendship!
If, after time, you feel that you might want to meet with this person for a real-life meeting, set-up mutual safety/security procedures. When I meet with a lady I met online, I automatically give her my cell-phone number. I also encourage her to call her best friend, sibling, somebody they trust, and keep them informed of anything they feel is important (ie make/model of my car, Where we are eating...). I encourage them to have their friends call at anytime to see how things are going. - Sure, it might interrupt a good story in the restaurant but at least she knows that she has friends or family who are there for her if she feels the need (which has never happened tome and probably never will).
I also suggest that the first meeting be held in a public place with activities which encourage talking. This roles movies and plays out. I personally enjoy playing a round or two of miniature golf because I can learn some very important things. If I am winnig, is she getting so upset that the game becomes more imporant that the possible friendship? If she is winning am I getting upset with her? Am I supporting her and praising her shots? Choose activities which allow you to have fun, learn about each other and talk.
If I am meeting the lady for the first time and we have discussed the possibility of tickling as well, I still leave her an "escape clause" If she doesn't feel comfortable with tickling yet, we don't tickle. I play it on her comfort level.
In my mind, the most important things in my focus are: comfort levels, trust, respect, and mutual desires. If is is not right for one person, it is a no-go.
I have met 4 ladies in real-life from online friendships - I have had tickling encounters with two of them (and built strong friendships as well) and I have an extremely close friendship with another one.
I know that most people online are just like you and me - they are good people. If you take your time to get to know them, if you set up safety/security procedures in advance, and if you trust your instincts then you can be on your way to some wonderful real-life friendships - even if they are long-distance friendships.