Instead of working together, they are at odds with one another.Paul’s admonition in 2 Corinthians is part of a larger discourse to the church at Corinth on the Christian life.” A yoke is a wooden bar that joins two oxen to each other and to the burden they pull.An “unequally yoked” team has one stronger ox and one weaker, or one taller and one shorter.
'And do not touch what is unclean; And I will welcome you. Paul taught that the believer was not to leave his/her (unbelieving) spouse. If my marriage to an unbeliever constituted adultery, which is a sin, then I must not marry (or remain married) to that person.
It might be a bit more of a stretch to create a "rule" against dating a non-Christian from this passage as dating is not really a good example of being yoked.
However, I do not believe it is gross misapplication.
First of all, the passage is definitely not discussing dating, as "dating" did not even exist in the first century.
It is also not talking about marriage specifically.