Doing that on public land is a risk. The USFS absolutely has restrictions on chemical usage. For example, pressure treated lumber is not allowed.

My internal dialog can imagine my biologist wife yelling at you already.

Honestly i do not know the full scope of this one, but if there's one thing I've learnt from observing her work over the last decade...it's humans need to stop adding chemicals to water bodies with the goal of thinking they're helping something.

> I think it's probably a pretty prosocial thing to do, unless I'm missing something

Agreed. I'm in South Texas where we have Aedes mosquitoes that are an invasive species and spread Malaria, Dengue, Zika, and other infections which kill people. I consider disrupting their lifecycle to be an unvarnished good. I carry mosquito dunks in my pocket when I go on walks and toss them into any puddles, drains, storm sewers, and ponds I encounter, and it seems to have helped a lot anecdotally. I care a lot about nature/ecology, but also fuck mosquitoes.

>I think it's probably a pretty prosocial thing to do, unless I'm missing something

Also massively illegal if you live anywhere that has a state level wetlands protection type law and the enforcement authority decides to exercise their discretion to make your life hell. They typically claim jurisdiction and authority over all activity in/around wetlands so theoretically you should be getting a state permit before digging a mailbox post hole or doing any sort of "management" of plants/animals but most of the time they just turn a blind eye to private homeowners who are being reasonable.

Wetlands laws and rules (non-criminal code generally, but wetlands are some of the worst) are written in a way to make RICO look like a meticulously scoped out piece of technical legislation.