Planting Along My Fence Line

My question involves real estate located in the State of: Florida
When we installed my fence we held inside the property line so that no one could attach to it because of they way hurricanes can take a fence down.
Also for that same reason we did not include a top rail on the chain link fence so that it has flexibility in the wind.
Now our none english speaking have been planting plants on this fence line that use the support of the fence so in time it will cause the fence to come down.
I have tried to ask them not to but they just either can not understand me or refuse to respect my wishes for my property they have also attachec a close line to it that I have asked to be removed but it is still there.

My question now is what is my next legal step?

IMO, I would remove the clothesline, either untie or cut. Next, IMO, I would use Roundup along the fence line to prevent unwanted plants and weeds from growing on "my" fence. ;)

In my city, a fence inside the property line within a few feet assumes the homeowner is willing to "give up" use of the land. After a certain time period , most states allow for the trespassers to have the ability to file for "adverse possesion."
I went through just such a situation, but the owner stopped the action 1 month short of the required time frame. She didn't know it was a 7 year waiting period, she got lucky (I guess).
She tried to have me arrested for trespassing in my own back yard, because the fence was anywhere from 12" to 36" inside HER property line. The police informed her of what's what (giving up use of her land), but because she informed them that she wanted the piece of her yard, it started the 7 years over.
As for them attaching stuff to your personal property, that's trespassing and creating an encroachment. Local law enforcement can help with that.