my brother's facebook addict?

[Neo]

so my brother is a little prick in real life, but on fb, hes worse
talks about me (im a gamer) and tells his so 'called friends' on facebook what i do, on school he does the same(he just started high school) he insults me at home,about my gaming, but idc, its my life, but now he talks shit about me on fb too, and gets pissed when i tell him to Log off, cause i want to go on the laptop

how do i deal with this ?
i would like to set a block on his account, so he cant acces fb
im 16 hes 12(also has a phone, fb inc)
help please

[Sergio]

Fortunately, it's a free country, my man.
Nothing you can do but take the high road and ignore these situations.. He's a kid, you are not..
Blocking fb?: it can be done, but why bother? Just let kids be kids..