system
Given the following post, respond as if you're commenting on Reddit:
human
I think it's a terrible idea to attempt communications with extraterrestrials yet. CMV

Since the discovery of telecommunications technology, humankind has had an interest in searching for intelligent life from other planets; these attempts to find other thinking beings include SETI and disks on the Voyager spacecraft.  However, I think it's unwise to alert potentially hostile civilizations, who are likely capable of superior space travel, of our presence until humanity itself is capable of reaching the stars, if only to flee the carnage of an invasion.  One has to look no further than European explorers' treatment of New World residents to get a feel for what may be in store for a civilization at the hands of another with superior technology.
EDIT: Sorry I haven't been able to respond as much as I'd like; there was a storm that took out the Internet where I live.  I haven't abandoned the post.

EDIT 2:I can see the merits of continuing some attempts at communication.  However, I would still be concerned about the equivalent of a bored or cruel child who kicked over an anthill for no other reason than boredom/cruelty.  I'm not as worried about this now, though, given that if intelligent life is common, it would have an outlet nearby, and if life were uncommon, then it is likely to be too far away to justify that sort of action.
gpt
It doesn't matter how technologically advanced we are, the possibility that an alien race is more technologically advanced will always be a threat.  Even if we had the technology to evacuate our entire planet, they could have the technology to vapourize our lifeboats.  As such, when does it become safe for us to try and communicate?