I think this issue needs to be explained much further.
1. Are the releases confirmed by authorities and the results publicized?
2. Is it a good-will gesture by just that LFS?
3. Is there a legislation (would have to be local) that bans the sales of the RTCs (and Pacus?) that forces all the LFSs in that jurisdiction to drop such sales? I am not aware of any state legislature banning their sales or keeping.
On a different note, there is nothing cool about having RTCs in our water bodies:
-- Our tax monies will be spent in millions trying to eradicate them (just like with the walking cats);
-- Local feral fish populations may suffer damages, illnesses, be competed out, eaten, or even be wiped out (in worst cases like the millions of trout that died in the Great Lakes as a result of the KHV - koi herpes virus a few years back);
-- Regulations and prohibitions will be passed that will encumber our hobby and hurt every one, from those who intend to keep an RTC to those who want to keep a pleco (in the worst case like in Australia).
The usual comeback is hey we already have a ton of invasive exotics... and RTCs can be a good game fish... and many good game fish are released in many places on purpose (look at Thailand and the fishing tourism boom) including for example pbass in the Miami, FL region.
But those are State-controlled things, not random releases by the ignorant public. The State decided that the local eco-systems would not stand up to released arapaimas. So, they are banned. And the Nile perch. And a few other monsters I forget atm. So, we will make RTCs next. And then, the State budget for eradication and damage control will be cut or they get tired of civil disobedience, and voila, the Australia scenario makes it here.
More reading on the topic:
http://www.planetcatfish.com/forum/viewtopic.php?f=2&t=35962&hilit=+Florida