I agree. Also note that for something like a Youtube account there are records associated (e.g. media files, logs, followers) which "suspending" could imply the

I agree. Also note that for something like a Youtube account there are records associated (e.g. media files, logs, followers) which "suspending" could imply the operator has not deleted, whereas "banning" seems more narrowly focused on taking away the communication privileges from user in question.