Why is it that whenever I want to like something on Facebook a security thing pops up?

[So Yeah]

I'll look up something like a movie or a band and try to like it, and when I do this thing pops up with a bunch of random scrambled words (we have to do this to make an account on Y!A and to add a picture) and it tells me to rewrite them below. I'm not sure if this is a virus waiting to happen or not, but I really want it to go away because I haven't been able to like anything in a few weeks now...

[Dynamicplane682]

That is called "captcha".
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Have you confirmed your Facebook account yet thru a phone number? Once you do that will stop. They do that to prevent people from setting up spam accounts.