I think political posters should be banned.
The very vast majority of them give no useful information. How can you fit useful information on a poster. All they give is a photo, a name, and vote number 1.
There are some political posters, outside of election time, that have useful information such as public meetin on Sunday. These are ok.
If we really must have these posters I think they should be restricted to certain areas. Councils can be instructed to put big wooden panels in the centre of towns, and the politicians can put their posters on them.
Lamp posts are for lamps, not for posters.