If a political sign has been posted at an intersection, for example...

[Fridays Child]

...is it still considered the property of the poster, with respect to vandalism statutes?

[Maddy McCall]

1. NOPE. And if there is a city ordinance against such things, then...

it is illegal.

Either way, you (or anyone)can remove it.

[Viking12]

2. Poster may be liable under litter statutes

if not vandalism. Civil engagement is great, but know your law before doing so. Many municipal codes are available on the internets (sic). Look them up and weigh the risk-benefit.

[Viking12]

3. Upon further review

I may have misunderstood your question. Do you want to rip down a sign posted on public property? Again, check muni codes but 99% chance posters are not in a position to make any claim to property left on public ROW.

[Fridays Child]

4. The question that came up here: ...Is it illegal to spray paint...

...over the big 4' X 8' political signs that are posted around town?

[Maddy McCall]

5. No, it isn't. Not if it is on city, county, or state Right of Way.

The sign being positioned on ROW is illegal in most instances. Removing or defacing it is a moot point, because the person who would have broken the law was the one who first placed it there.

[Fridays Child]

6. Coolness.

I am going painting. ;)

[Maddy McCall]

7. Report back.

I've been tempted to hit a few dumpsters with "Dump Bush!" but that IS illegal.

Be careful. :-)

[Fridays Child]

8. Roger that.