samchristie321
A way to get around the issue is to check if the complete series you want has been released on DVD as a box set. If a box set exists you can request the complete box set in one request.
If you can find it on e.g. Amazon it will be a valid request.
TahaTV
You can probably do so yourself, as you decide yourself what you want to post on main. If you want to follow such a rule yourself, you could add it to your profile description.
If you want to make it mandatory for other uploaders to do the same, you need a new rule among the uploaders, demanding that if they post one season of a series, they also always have to post all other available seasons of the same series.