I think there are more things to worry about than blokes with their tackle caught in toasters, even though I still can't wrap my head around that one!
Having had first-hand experience of, and heard feedback from, the BDSM community, 50 Shades of Grey crosses a line from consensual BDSM-play into rape, fairly blatantly. Grey uses coercive, manipulative means to "seduce" the young, naive Steele, even going as far as to ply her with booze. This in itself is a big-no-no in the BDSM scene but the real problem comes when Grey refuses to stop, even after Steele uses the safe-word.
Once that word is used, consent is redacted. No ifs and no buts, a line has been crossed and the safe-word used. That should bring everything to a halt, immediately. It means that the person using it is no longer comfortable and secure about what is going on and wants things to stop, or change at the very least. That's the whole point of the safe-word. Grey however does not stop and threatens to have her gagged if she continues to resist and in doing so crosses over from BDSM to sexual assault and rape.
Yes I am fully aware that this is only fiction but you know what people who are not properly educated in such matters are like. They will assume it is the done thing and if just one person is stupid enough to copy Grey's example, and you know it will happen, then they will be inflicting serious mental and physical harm on someone they are supposed to care about.
BDSM sessions can be very extreme, hence the safe-word. Also, both parties help each other "come-down" after a session and this usually involves a lot of cuddling, love and support. This also doesn't appear to be part of Grey's repertoire and so another important point missed.
Yes there are bad-apples in the BDSM community but most aren't. Watch / Read "50 Shades" by all means, I'm not telling you what to watch / read or not watch / read, but for pity's sake don't think that it's in any way a guide to fulfilling or even legal BDSM play.
If you want to indulge in a bit of kinky-play, all power to you but I urge you to learn about it from someone who actually has a fucking clue!
And don't ever stick your dick in a toaster, that's just stupid!