If the need may arise, then speak to them in a humble tune, and do not speak in the slightest bit disrespectfully.you love ur grandfather(ikram)---its not as easy when its someone you don't evn know properly and who isn't exactly that kind of relative and who is totally mean and nasty and unfair..
but of course Allah's rules have to stand above all Insha Allah (not easy though)
The du'a of your elders, cherish them
