I'll hold my hands up and admit, there have been times I have lobbed a gel packet! Generally I put any litter (little bit of cling film) up my short leg, banana skins back in my jersey pocket, gel packets, usually wedged somewhere on the bike so I don't get sticky pockets etc, but on occasion when they have been exceptionally sticky, or if I all of a sudden needed free hands I have lobbed it. No excuse, poor behaviour on my part, but I have done it and chances are there will be some occasions in the future when I do it again, albeit few and far between.