They say to pinch out Aubergines when they reach 12" , don't think it is recommended for Peppers.
Mine get staked, and pinched when they reach the top of the greenhouse, no they are not super tall, just sitting on a shelf, which happens to be about 12" below the roof!
The peppers I just stake, and let do their own thing ;D
Had loads of Aubs last year ;D but my peppers all got eaten by huge caterpillars :'(