Guilds are made for any leader's sole purpose. As rufus said some guild are just mainly for gst and will probably never kick those members and only have like 7 people in the guild (5 core 2 sub). Then there is a "Guild for friends" where you just fill up a guild with all your friends which might not even require the tags to be on 24/7. Then there are those family guilds that may require you to be on tag 24/7 or something close to that. And the last thing is a tower taking guild, which has been said previously kick and recruit members, which consist of multiple allies to help keep the tower.

Each guild has a different view of what a guild should be. Like some guilds can be a family guild and at the same time be a tower taking guild (Zanza) others could be a Guild spar guild and a friends guild (US?) and sometimes all of the above.

I can say on the behalf on the tower guilds that they need to have a system to regulate how to take towers. Before the allies system came out this has also been used but more like if there is an allied guild that the person would have to pm you and recruit. That does not make it say your not loyal to the guild just means that they want to be able to keep a tower with active people at a certain time.

On the behalf of family guilds, you can probably see the difference in loyalty from a tower guild, but you will still have some people that do go off tag to probably go to a tower or do something else. I myself can say that stay on Feare tag 24/7 is not very much fun seeing how it's just like 2 or 3 people on tag once a day.

I can agree that there are many many people who are "hat chasers", I myself could be one, who are very loyal just to get the hat. Then other times they might not be as loyal and just waste a tag