In case you didn't know, legalization's a LIE, or at least is in Canada, and they want to spread that model to the rest of the world. That's why we're saying STOP TRUDEAU just like we said Stop Harper!
The Stop Trudeau symbol is a play on two things. First, it is a play on the THC symbol. Under Trudeau's legaLIEsation. Under this model, all cannabis products must come in opaque, smell-proof, sound-proof containers, and cannot contain any logos or packaging except the erroneous symbol of sin and stigma.
Second, it is a play on the Stop Harper meme. The funny thing is, the horrible cannabis legislation that was being proposed by Harper that partly inspired that meme are the same (or even more lenient in some ways) than the "legalisation" being implemented by the q... I mean Trudeau. See the first link above for more info.