PRIVATE WEBSITE
You, as an individual, can create your own website, and do or write as you wish on it. It's your site. The law will deal with you if you should violate a law during your "free speech". (Remember, boys and girls, slander of other people is not protected by freedom of speech in any country.)
When you create your site, it's your "private property". You have the right to block anyone and everyone from posting on it. You can delete anything you disagree with. It's your site, those posters are guests, and as such they are limited to what you allow on your site. As that applies to you on your privately-owned website, so it applies to privately-owned websites that are not yours.
Every site is privately owned; be it by a person, a university, or a corporation, it's still privately owned. What can and can't be done on that privately owned site is determined solely by the owner. That is why almost every website has some form of rules, or Terms of Use, which you should read and agree to before attempting to post anything on said site.
Cries of "Freedom of Speech" or "They banned me!" are both wrong and a waste of energy when you are in violation of rules you said you would follow when you joined.
Attacking/harassing another user on this site? You don't have that right. It's a violation of the rules you agreed to follow. Being detrimental to someone else's enjoyment and usage of this site is not and never will be within your rights. That's pretty much a given on any website worth wasting time on.
Abusing the services of the website? (Spam-scrobbling, wiki defacement, uploading offensive images for artist images, etc.) You don't have that right either.
You're on the website owner's private property. They give you the right to freedom of speech (even the right to complain about them when not done in an obnoxious manner), but ONLY within what is permitted by the rules of the site.
If you fail to follow the rules of any site, you subject yourself to removal. No one is to blame but you, yourself. "Freedom of Speech" does not and never will override the house rules of a privately-owned website.
Subscribing changes nothing. Being a subscriber gives access to some extra functions on the site, all of which are documented on the Subscribe page for you to read before you even subscribe. None of those extra features include the right to violate any site rule. Subscribers who do repeatedly violate site rules risk account loss like any other user, and are given no preferential treatment in such matters.