I wouldn't worry about it. I served on a jury 3 years ago and during the jury selection process they had an Arapahoe County Court (South Denver metro area) judge address the potential jury pool in the room which was about 300-400 potential jurists.
Afterwards the forum was opened to questions and I asked the judge what would happen to someone who ignored their jury summons and didn't show up. She told the entire room that while they like citizens to take their civic responsibility seriously, that since so many people do show up for their jury summons that she is not aware of Arapahoe County ever taking any further action on a jurist who ignores a jury summons.
This may differ from county to county and state to state and is likely dependent if there is a shortage of potential jurors, but my experience has always been that there are more than enough potential jurists who are very anxious to serve on these juries.
Gord