nope, tried it with one of my chars who got it before others, and still had to zone a bunch to get it for the others.
The alternate way of gaining the achievement works as well. The alternate way: -Have someone place the reward painting of Bristlebane in a house/guild hall you can access -Right click the painting and select Stare Into Madness from the menu -Eventually you will be ported to Shard's Landing and get the achievement (as well as the reward) Got it in one right click on a toon...also got it on the 159th on another, so your mileage may vary Goodn
Seemed there was no viral component to the achievement, just a random buff "Gift of Laughter" anyone could get while zoning. I ported me and my crew around with my wizard randomly and no character got the buff at the same time. I think I got 3 that way and just spammed Gyrospire Relocation Device on the rest.
This really, for me, is the best way to get this achievement, without having to worry about the viral, which has always been flaky at best. The painting does seem to work for it and isn't limited to April 1st.