regular tt drivers know each other... most of them never had frequency clash problem. so where the problem coming from?
if you buy a new kit or RTR, there is a manual inside the box that tells the safety measure when playing rc. Though, most of them is written in Jap, i think standard 6 student can also elaborate the message. so, who's got to be blame?
finally, if you tink u can't mix with regular tt driver... don't bother to play at tt... just say hi to each other la... then ask wat frequency... the next time you come, sure u'll remember wat frequncy they used... if still can't remember, take a cup of nitro fuel and drink... sure can remember mahhh...