Totally agree with you. But If you get too tired of them... I think that 2 or 3 runs of spinosad kills it all. Again, theres none visible sideeffect. And I put about 1 cl to mix 0,5 liter water. (the day after, none "kalk" spots, smell or anything. So I allmost think it wouldnt make any damage...
About the shipping. About the pesticides your prop right, but as long as I use only 1 cl and have ernough to spray 2-3 times - im not so concerned about the environment.
When you do some searches on spinosad, it appears as an normal "house fly" cure. (in powderform, where small amount should be placed in small concentrations = no more flys) so dont think the customs would think cannabis. And its also "just" an normal product agains thrips... etc.
Cheers and have a nice weekend, when time comes...
P.S. Just found this thread, all only positive feedback on the spinosad. And one says its a living bacteria = harmless... (for your information)