I have had about 4-5 of those tickets, most of them on Scottsdale Rd, or tatum just north of shea (thats where those pesky trucks always are).... I never replied to them, and never heard anything about it... Just re-registered my car at the DMV, nothing came of it....
About two months ago the company I work for had to update our records and do background checks on everyone. All my tickets showed up, all with the status of dismissed.