But when I do....
(forgive the meme, lol)
.....anyways.
When I do summon people, I like to make a run-through of the place, killing off any especially dangerous things that don't respawn, I like to trigger the shotcuts, grab whatever loot I can find/am interested in, and then I'll go back and rest at the bonfire near where the summoning signs are placed for whatever boss I want help with.
That way... if I get invaded, I don't have to worry about more dangerous-than-usual mobs interfering (like the titanite Demon in AL, the Channeller in the Parish, etc etc etc). Also, the phantom(s) I summon get a nice quick run at the boss and any medals they might be going after without a bunch of doinking around trying to open shortcuts (leaving us more time for someone to invade).
And at the very least, I always open the AL shortcuts so they don't have to go through the Hell of the Archer Ledge any more than absolutely necessary.
I'm probably like a Sunbro's best friend, I'd imagine.
How many other people actually put the work in to make a phantom's life easy?