Good Thing you ask
Frost v TCLF:
Frost's fault. He forced him onto the grass so that TCLF couldn't avoid sliding into him. Also worth mentioning that JonBoy must have had a daydream or something. Slowest reaction ever
TCLF's rejoin:
In this situation a stupid idea because he rejoined on the racing line with 0 Speed while a lot of cars were approaching 3wide. You need to make sure that noone drives on the line where you rejoin. And the first straight on a race start is a big nono simply because the cars might approach 3-4 cars wide.
STD/UFB:
Yellow flags were out. So you have to expect something bad (and of course slow down). I understand that the first row didn't expect him rejoining but what are the rest doing? They drive like he isn't there and then wonder why they crash into him. Can't you guys drive around him and tell the admins or TCLF what tremendously stupid thing he did, after the race. The admins know about these risky situations ... and believe me ... Speedy is like an elephant, he remembers everything.
This was of course my personal opinion.