I'm sorry but the pro's outweigh the cons. SRB is necessary in itself for when people wish to deactivate for what ever reason they have. Whether it be because they feel a security that there wont be a chance of hackings, or fakes, or scams. or other personal reasons that they just feel they don't wish their account to be available to them when they're trying to not access their account.
One example I can give you Matthew, when I wanted to go an study for my exams, I requested a SRB because I wanted to ensure I had that self-control and could stop myself from visiting the forums when I had other important things to do. Sometimes it's necessary for us users to have that SRB ideally in place for such scenarios. I guess I can also use Roary as an example, lately when he SRB'd as things got too much IRL, etc People can focus on Irl and know that their account in SRB'd and that way people who miss them, or wonder where that person is, will know exactly why or that they are SRB'd.
I hope I'm making sense it is 3:40am.
In addition to that, I just realised Fb has the deactivation plugin right, I totally understand what this plug in. I would find it much easier if I ever needed to SRB again, to have a simplistic way to do so, rather then make threads randomly all over the place and have staff do extra duties.
Again that's why Wortels suggestion of a specific section or (sticky) to have people post specifically in to get SRB would be equally beneficial, at the lesser extent of you guys having to put effort into implementing another plugin.