This was something that was done on TT and seemed to be pretty popular. If I'm recalling correctly, it was called "The Tickle Fight Thread".
While it was fun, there were boundaries that had to be watched.
Some of the female members weren't comfortable having strangers come in and virtually tickle them. As a gay man, I had to be mindful of which guys were cool if I joined the thread, and which were not open to M/M.
It also only worked well if regular posters took part. There were times someone would "grab" "Member A" and start to tickle, but then that member wouldn't be back for 3 days or more, so replies could be delayed.