I don't know how this would work, maybe as a secondary weapon, or even if they randomly spawn like crates, what do you think?

Start the map editor, and place a little, barely noticable bloody deadly polygon on the ground.Voila.

Yeah but it would add another tactical element to CTF ot INF if you could lay landmines, or have them randomly spawn. Plus huge explosions when setting off a landmine would add to the shock factor.

ok, now use the search and next time do the following:
you have an idea? Great (or not great, that depends)!
1. Read the Sticky!
2. Reread the Sticky!
3. Use the Search!
4. Use the Search (with different keywords).
5. now, if you haven't found it already in the search, post it.

http://archive.forums.soldat.pl/topic.php?topic_id=17528&SearchTerms=mines
http://archive.forums.soldat.pl/topic.php?topic_id=12239&SearchTerms=mines

plz next time use search... its been suggested and turned down