Geez, if someone considers booking for that in isolation you'd be booking the whole Kop...Appeal - "Handball ref!"
Dissent - after you've made it clear that you're not giving it, "That was a handball ref"
We don't apply that level of tolerance - but that IS dissent, by the strict word definition.
Footballers have opinions, it may disagree with yours, we don't want drones, but there is a line for him not to cross, where that line is is up to you...