There are people that always stand by Laining and people that always sit. Among those that sit there are those that stand at certain points, such as the Aseres HaDibros or the Shira, etc. Is it proper to accord special honor to specific parts of the Torah over others?
If I understand him correctly, Igros Moshe (OC4 22, IIRC) says that one may stand during the dibros so as to accord them honor and must do so if the rest of the congregation is doing so but that if he is concerned that that makes it seem like they're the only important part of the tora then he should stand also during the rest of the reading that day. As always, CYLOR for a practical ruling.
The Rambam was opposed to it. yet this is near universal custom.
R' Soloveitchik and R' Moshe explain why it is not a problem.