Sorry guys, but I don't want you to be me my friends .

[t11_fan]

There are 2 different point of view:
1) If you want "easier" league and other competitions, then you won't add them in order to decrease chances of playing together next season. Question is then - where is fun if you play against robots/weak competition?
2) You can add them if your competition is boring, though competition means more fun. It annoys me more when I loose against bot than against good rival. However, though competition = harder to win trophy

If you want friends just to receive packs, then add friends which are not from your level. I suggest to look for 3* player auctions, there is enough players from lower level and they certanly won't play against you.
If you want your league to be fun, though then add strong players from same level.