<p>Don’t worry to much about it. Colleges know you’re applying other places. And I’m sure that plenty of people apply to both Yale and Harvard; they both know it and expect it, so it will be no big deal. </p>
<p>However, one concern is how safety schools might interpret your list. If one of your safeties looks at a list full of more prestigious schools and realizes that they are your safety (and thus you’re unlikely to actually matriculate there if they accept you), then they might view you less favorably. Just make sure they know you’re interested in them by demonstrating that interest.</p>
<p>Also (and this is just speculation), it might look bad if you apply to ALL the Ivy leagues or other prestigious schools. Then it looks like you selected them not because you care about their schools, but because of their name.</p>