Free domain - one more big minus

To pay for domain name or get it for free?

Today I've got a new argument against free 3nd level domains. I've lost my domain *.box.tl. I've found out that Google Webmaster cannot check my rights for this domain.
I tried to open my account at *box.tl - but the site was not answering.
For me this domain means nothing I've no site with this name - only redirect to my 2nd level domain and site. But nevertheless it's not good.
And some time ago (I thing a month or two) all *co.cc domains was blocked by google and by some antivirus programs (I'm not sure about all anti-viruses but ESET blocked it and I lost access to my *.co.cc sites).