The guideline to wait to date is inspired counsel from Latter-day prophets. Hazards exist if you date before you are emotionally and mentally able to deal with the physical feelings that come from serious relationships.
When choosing someone to date, look for and date only those people who have high moral standards.
The time will eventually come when you will be ready to prepare for temple marriage through steady dating and courtship.
Until then, choose to uphold your standards and follow the Lord's counsel while dating.
The truth is that online dating is more common than ever before among LDS singles.