My Obama sign was stolen over the weekend and so was

my sister's sign. Could someone please suggest ways to keep this from happening?

I have also seen the "coat it in vaseline" suggestion

As per a lawyer, here's why:

You put pepper spray coated vaseline on your Obama signs.
Some asshole freeper steals your signs.
He gets vaseline and pepper spray on his fingers.
He gets into his car and drives away.
While driving, he tries to wipe the vaseline off his fingers, and gets some of the pepper spray in his eyes.
He gets into a terrible accident and kills someone's kids.
The police investigate, and find the vaseline and pepper spray on his fingers and on your signs.
The freeper asshole is convicted of manslaughter and SUES YOU for "causing the accident."
Even if you don't get into any legal trouble, you are still open to a civil suit and may be liable for lots of damages.
Even if you don't have to pay damages, it will still cost you a hell of a lot of money and time defending yourself.

Better to just replace the signs when they are stolen, and/or bring them in at night!

so they get all icky when they try to take it, and it messes up whatever they put it in.

you could get a dog and leash it to the sign (or close by) at night and while you're gone.

surveillance is expensive and usually not effective unless you have it record what is happening to play back.

i wonder how effective a motion detector would be like the ones they use for outdoor lighting? could put one of those right there, and then it will also illuminate the sign as the thieves are running away.

i dunno, the vaseline one is the only one i actually heard someone use with a degree of success.

and had them both stolen at the same time. Who would be so angry to make a night of it? I'm going after work today to buy us more signs and to report it to the campaign (not that I think it matters much at this point).It just infuriates me,I've never had it happen before and neither has my sister.

Plus an optional dose of pepper spray or something very spicy.

The alarms were like $10 at the time. If someone started to pull the sign, it would go off hopefully scaring them off.

Others have more nefarious measures, such as itching powder and such...but I'd just try to make it avoidable, rather than cause injury.

causes some discomfort.

MUCH more obnoxious than vaseline.

Just don't put it along the top edge of the sign, where birds might perch and get stuck.

Good luck.