I feel so bad for ants

I was wondering why a whole trail of ants was playing catching in front of me below my keyboard.

Then I remembered a very important thing:

An empty cup that hosted rather sweet barley drink was left beside my mouse.

Holy bangsai.

I went to grab the cup and looked in--HOLY!!! The ants thought it was the best place for a holiday resort!

Liz, who absolutely hates having ants running all over our room (or house, even), unleashed upon them her wrath--by pouring some water into the cup.

...I watched ants float and struggle in the water.

Ohhhh myy goooddd I feeel so baaaadddd DDDD:

On a side note, anyone has any good ideas for getting rid of ants from the house? I really hate to have to be the mass murderer of ants =_=... (To this date, I still can't really bring myself to kill them. ._.)