I am a beginner (HQ 3) and I have read most of the wiki articles which helped me answer a lot of questions but some of them still remain :
Q1. If I can see some player on my map can they see me too ? Is there a scenario where his radar level is low and mine is high and so he cannot see and attack me ? Q2. Lets say I can see ABC player on my map. If somehow I could see ABC's map will the placements of islands around his base be the same as I am seeing it on my device ? Q3. If I attack a player and I successfully destroy him will I disappear off his map too ?