On Twitter, if you block somebody, will they know?

[Country]

yes of course , people are not stupid.

sme goes w facebook or myspace.
the worst thing is making certain people see certain things thats so rude and shady. like I said it will say "YOU" cannot view this page.
so its obvious on that.
or twitter obvious also. plus if any old posts were there is will be obvious too.

sometimes though people can confuse this with a person deactivating thier account though

dont know I do not go on the social internet because the cia spies on people and if you are against obama, area christian ect you will be on FEMA'S list with the nsa and homeland security to be placed in residential FEMA concentration camps during fema martial law soon in america.
so deacivate thats shit asap