1 Well, of course you can get away with anything if you can plausibly lay the blame on an alternate universe. The tricky part lies within that word, "plausibly," of course.

2

95% of habitable planets look like Vancouver, Canada.

Unless the hot chick is Goa'uld, she's likely a good guy.

Few aliens have discovered sarcasm.

3

Religion is based on the worship of stupid, post-industrial beings. Unless you're a "fanatic" and worship the stargate itself.

 

Any fraternizing between soldiers must immediately be followed by a time warp or a dimension hop.

 

True love is doomed. The best you can hope for is to be with your loved one after you've died.

 

Even if your planet has had no outside contact for thousands of years, you will still speak modern english.

4 Even if your planet has had no outside contact for thousands of years, you will still speak modern english.

With the solitary exception of Abydos.

5

If you have an incredibly valuable and useful portal to thousands of other worlds, you will most likely forget how to use it, and only in the rarest circumstances will you guard it.

In contrast to pretty much all of recorded history, most civilizations are both peaceful and liberal.

One shot stuns, two shots kills, three shots disintegrates.

The floor is never "out of phase."