You were getting trolled by people trying to use RP as their reason for it, plain and simple. The average RP'er won't seek to grief or ruin other players' experience if they aren't in on the RP beforehand.

Weirdly enough the only time I've seen people actually RPing during roulette runs, they were some of the fastest most efficient speedruns I've had lol they clearly had macros to deliver IC lines and such while keeping a steady pace (my favorites were the G'raha and Alisaie lookalikes)