A question with regards to MEGA / other file hosts?

[tvwatcher38]

Forgive me as I'm a new at this  file sharing & my question maybe really stupid but I just want to make sure that I understand what's going on.
Whenever I click onto files that I have uploaded & get the link a new screen pops up with a copyright warning that I have to agree or disagree with before it will let me see my link. That was never there before.
So my questions are as follows:
1.Is everyone else getting those?
2. Is this legal formality for mega to cover their ass ?
3.Is this maybe a precursor to getting an email take down notice ?
4. Do other file hosts do the same thing ?
Thanks in advance for any answers & help you can give.

[marsmen]

simply click away.
yes that's just cover her ass.
This is normal for mega.
no panic.

[tvwatcher38]

simply click away.
yes that's just cover her ass.
This is normal for mega.
no panic.

Thanks for getting back to this jittery newbie so quickly. What a relief