Bernardiniu street which runs off the bottom end of Pilies street in the old town seems particularly susceptible to the work of these vandals (who have also broken off the teapots fastened to the wall at the shop on the corner of these two streets).
Other street also suffer from this vandalism.
What amazes me is how nobody sees anyone doing it? Most are scribbles (I think they call them tags and that’s what they should be wearing) but some will have have taken quite a long time to do.
The Vilnius authorities deserve credit for painting over these from time to time as you can see but it must be a thankless task.