is putting downloaded PLR articles on your site considered plagiarizing?

I downloaded a packet with PLR articles from niches A-Z
would it be plagiarizing if i post some articles on my site since I downloaded them instead of paid for them ?

If it is... you'll get a phonecall from the owner. Asking you to remove it. But that will not happen... If it does you may want to do so. But google isn't going to care. Of course you wont rank as well since a lot of sites probably have that same content on theirs. You should check and see if other sites do, and see how well their ranking is. Might be a waste of time on your part.

If you fear legal consequences, you really should investigate. In my country, it is matter-of-fact that you get something like a cease-and-desist in no time.

PLR articles... are you sure they can be called that way? I found in my huge collection of PLR articles so many ripped stuff.

So if you are paranoid, host offshore and buy also your domains there. Or make your homework and find out if revealing your identity from a whois-protected domain is easily possible by law.

A wise person would rewrite or spin those articles so they become unique.

{learn|to|spin|your|articles}

Absolutely not. I've been posting PLR on a lot of my blogs for years and never had a problem. PLR means "private label rights". You have rights to use the product however you would like. You can make an ebook with the articles, post them to websites and blogs, or rewrite them and submit them to article directories. If you do submit them to article directories, make sure they are at least 70% changed from the original.

I often use PLR but only to get ideas, then I put the ideas into my own words and come up with an original article.