Just deactivate Friends plugin then

that's not an option

go to your admin area go to global privacy and uncheck add a friend for each role this should stop members adding friends ........

You need to specify, what exactly are you trying to achieve, so we could assist you better. 

sorry ross, maybe im asking too much, but oxwall should have option for user to not receiving friends request again or receive message anymore.

sorry i make mistake creating this topic. i know i should go to user voice or developer for this

It's no problem.