Is it normal i write each word beginning with a capital?:

that'S discriminatorY againsT thE enD oF wordS. whY shouldn'T theY geT capitaliseD sometimeS?

You have the dreaded "Title Of A Book" syndrome. It's curable, and fairly common. Lol.

I Hate It.

Looks stupid, waste of time. You only do that for titles.

It looks weird because that's not what capital letters are for. Everything you wrote looks like a title. Have you been smoking pot?

You make yourself look dumb. Stop it. Just stop.

It pisses people off and makes them less likely to ever want to talk to you through text, email, or Facebook.

It's incorrect.

This is the internet so it isn't that big a deal. However, in the real world you have to learn proper grammar if you want to succeed.

This could lead to some serious psycological disorders...